Smoke consuming ftjenace



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Y SMOKE OONSUMING' FURNACE. No. 365,571. Patented June 28, 1887.

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STEPHEN BOND, OF CONSTANTINOPLE, TURKEY.

SMOKE-CONSUMING FURNACE.

SPECIFICATION forming part of Letters Patent No. 365,571,1iatec'l June 28, 1887.

Application filed April 18, 1887. SerinlNo 235,210. (No model.) Patented in EaglandJune 30, 1886, No. 8,583.

To all whom it may concern.-

Be it known that I, STEPHEN BOND, a subject of the QueenofEngland, residing at Constantinople, in Turkey, engineer, have invented certain new and useful Improvements in SmokeConsuming Furnaces, of which the following is a specification.

This invention relates to apparatus for offecting theconsumption of smoke in steamboiler and other furnaces by the introduction into'the combustion-chamber of highly-superheated steam and heated air. The exact-form ofcapparatus and the manner of applying the same will vary with the type and size of boiler orfurnace; In a horizontal return-tubeboiler I carry a pipe from the top thereof into the smoke-box, across the bottom of which it extends. To this pipe I connect branch pipes passing through the tubes from the smoke-box to the combustion-chamber and terminating in jets or distributors. The air is supplied by means of one or moretubes which pass through the smoke-box and afford a communication between the boiler-tubes and the outer air, the

admission of air being regulated by valves fitted to the ends of the tubes in the combustion-chamber. For regulating the escape of the heated gases and air I employ a damper or shield placed parallel with the tubeplate in the smoke-box opposite the ends of the tubes. The shield may be mounted on parallel horizontal guides, and can be moved nearer to or farther from the ends of the tubes by means of a screw projecting through the front of the smoke-box and provided with a hand-wheel.

In the accompanying drawings, Figure i represents a front elevation of a return-tube boiler with one smoke-box removed. Fig. 2 is a longitudinal sectional elevation of the same, the section being taken through the line A B. Fig. 3 is a partial elevation of the 0pposite or combustion end of the'boiler. Figs. 4, 5, 6, and 7 are details of parts hereinafter referred to.

Cis the outer shell of the boiler, D the waterspace, E the combustion-chamber, and F the chamber and smoke-box.

From the highest part of the boiler two steam-pipes, H, are carried down to the level of the lowest row of tubes G, passing horizontally in front of the said row oftubcs. The junction of the pipes H with the boiler is effected by means of the steam cock J, while a regulating-valve, K, is inserted into each pipe in any convenient position. To'the horizontal portion of each pipe H are connected branch pipes L, which pass from front to back of the boiler through the tubes G, and terminate in roseo'r T shaped heads having orifices or perforations ofsuitable size,and so arranged as to direct jets of steam over the whole ofthe combustionchamber opposite the ends of the tubes G.

Asuitable form ofdistributing-head isshown at L, Figs. 4, 5, and 6, the former an enlarged view in section of smoke-box F, tubes G, and pipes L, on the end of the latter of which is screwed the hollow knob or bulb L. (Shown in detail in Figs. 5 and 6.) Nipples Z, formed of any metal capable of withstanding the wearing action of the steam, are formed on the exterior of the hollow bulb, and perforations Z are provided for the passage or escape of the steam, the number and size of the perforations being capable of variation.. By opening the, cocks J and K highly-superheated steam in a finelydivided state. may be ejected into the combusti oil-chamber, where it will become intimately mixed with the inflammable gases and particles of smoke or carbon therein and assist in the combustion thereof, thereby preventing the passage of smoke or unconsumed fuel through the tubes G.

Air is admitted to the combustion-chamber through the tubes G, several of which, situated in the two bottom rows,communicate with the, outer air through pipes M, terminating outside the smoke-box. The ends of these airpipes may either project beyond the side of the smoke-box, with an expanding-orifice, M, in the interior of which is situated a regulatingvalve, M or the pipe may stop flush with the side or bottom of the smokebox, and the admission of air be regulated by means of a cutoff plate, such as M working on apivot, m, fixed to the side or bottom of the smoke-box. (See Fig. 7.)

' (No Model.) I

G. B. BOOMER.

GOTTONBALE TIE.

No. 365,572. PatentedJune 28, 1,887.

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